Means for directly coupling main motor shaft to working machine

ABSTRACT

Disclosed herein is means for directly coupling main motor shaft to working machine with a coupling head as an intermediate component. By applying highly accurate precision machining technology. The machine unit assembled according to the present invention does not require recheck of dimensional deviation after completion of assembly. The present invention is applicable to both upright type and lateral type machine units.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to means for directly coupling main motor shaft to working machine, and more particularly, means for directly coupling the shaft of a main driving motor to that of a working machine on the same machine base.

[0003] 2. Description of the Prior Art

[0004]FIG. 1 is a schematic view showing a conventional scheme of a main motor shaft directly coupled to a working machine wherein a main motor 91 drives a direct coupling shaft 93 by a shaft coupling 92. As it is shown in FIG. 1, the main motor 91 is fixedly mounted on the headstock 95 of a working machine 94. With such a layout, the geometrical accuracy of positional relation among the main motor 91, direct coupling shaft 93, and the headstock 95 of the working machine 94 has to rely on working clew's precision aligning skill. However, it requires a long time labor and high production cost to attain the necessary assembly accuracy for the machine to work without too loud noise or severe vibration. Besides, there is other problems such as strenuous regular maintenance and expensive repairing work.

[0005] In order to palliate the above described existing shortcomings, the present inventor has delved into this matte for a long time, and after repeated efforts of reseach, simulations and experiments, finally has come to realization of the present invention.

SUMMARY OF THE INVENTION

[0006] It is an object of the present invention to provide means for directly coupling main motor shaft to working machine so that the previous shortcomings as relying on skilful workers for precision alignment, requirement for high production cost, and wasting long time labor for assembly can be eliminated therefore improving marketability.

[0007] It is another object of the present invention to provide means for directly coupling main motor shaft to working machine so that too loud machine noise and severe machine vibration can be alleviated.

[0008] To achieve the above mentioned objects, means for directly coupling main motor shaft to working machine according to the present invention comprise: employing a machine headstock having an installation cavity; a coupling head formed of a hollow body which can be sleeved into the installation cavity of the headstock along the outer edges of the hollow body; a direct coupling main shaft inserted into the coupling head along the head's inner edges; a main motor for supplying driving power; and a shaft coupling for coupling the main motor with a rotating shaft of the direct coupling main shaft such that the driving power of the main motor can be transmitted to the rotating shaft via the shaft coupling. For assembling the aforementioned components, such as the coupling head to the headstock, the direct coupling main shaft to the coupling head, the main motor to an main motor interconnecting plate, and the interconnecting plate to the coupling head, screw engagement is employed in all cases. Meanwhile, the above mentioned interconnecting plate is interposed between the coupling head and the main motor.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above objects and other advantages of the present invention will become more apparent by describing in detail the preferred embodiment of the present invention with reference to the attached drawings in which:

[0010]FIG. 1 is a schematic view showing a conventional scheme of a main motor shaft directly coupled to a working machine;

[0011]FIG. 2 is a longitudinal cross sectional view for illustrating means for directly coupling main motor shaft to working machine according to the present invention;

[0012] FIGS. 3(A) and 3(B) are view illustrating how the main motor shaft is coupled with the working machine according to the present invention; and

[0013]FIG. 4 is a cross sectional view of an assembled direct coupling main motor and working machine according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0014] Referring to FIG. 2, a working machine 1, a coupling head 2, a direct coupling main shaft 3, a main motor 4, a shaft coupling 5(see FIG. 4 for detail) and an main motor interconnecting plate 6 are assembled to form a directly coupled motor and working machine unit. Further to this, the working machine 1 includes a machine headstock 11 with an installation cavity 12. The coupling head 2 is formed of a hollow body which can be sleeved into the installation cavity 12 of the headstock 11 along the outer edges 21 of the hollow body. The direct coupling main shaft 3 is to be inserted into the coupling head 2 along the inner edges of the coupling head 2. The main motor 4 is for supplying driving power to the working machine 1. The shaft coupling 5 is employed to couple a rotating shaft 31 of the main machine shaft 3 with a rotating shaft 41 of the main motor 4 such that the main motor 4 may drive the shaft 31 to rotate. The interconnecting plate 6 is interposed between the coupling head 2 and the main motor 4 and interconnects the above two components with screws 72 and 71 respectively.

[0015] Referring to FIGS. 2, 3(A), 3(B) and 4 simultaneously, the direct coupling motor and working machine unit is assembled by means of the present invention in the way that firstly detaching the shaft coupling 5 in two parts, a main motor shaft side 51, and a machine shaft side 52, and then fixing the shaft coupling 5 appropriately in the accurate position after the motor shaft side 51 has been mated to the rotating shaft 41 of the main motor 4. On the other hand the machine shaft side 52 is sleeved into the rotating shaft 31 of the main shaft 3 and appropriately fixed thereat. Then, the bottom portion 23 of the coupling head, 2 is sleeved into the machine shaft side 52 of the shaft coupling 5 to which the main shaft 3 is attached. Then a gauge 8 is set on the rotating shaft 31 of the main shaft 3 so as to check if the positional deviation of the coupling head 2 in its inner cavity 24 is allowable. When it is considered to be allowable, the main shaft 3 is directly coupled to the coupling head 2 with screws 73. After that, the coupling head 2 together with its screw engaged main shaft 3 is inserted into the installation cavity 12 from the bottom portion 13 of the machine headstock 11 of the working machine 1 and engaged with the headstock 11 with screws 74. Then, by applying precision machining technique, adjusting the accuracy of parallelism between two contact surface planes 61 (contacting the coupling head 2) and 62 (contacting the main motor 4) of the interconnecting plate 6 in a range within 2 um and controlling the clearance between the coupling head 2 and the main motor 4, and the positional deviation of the inner cavity 24 of the coupling head 2 to a minor possible value. After that the main motor 4 can be screwed onto the interconnecting plate 6 with screws 71, and the interconnecting plate 6 can be screwed onto the coupling head 2 with screws 72. By so the assembly quality of the main motor 4, the interconnecting plate 6 and the coupling head 2 does not need to recheck before operation of the working machine 1. Finally, assembly work for the whole unit is completed by connecting the main motor shaft side 51 and the machine shaft side 52 of the shaft coupling 5. Incidently, the present invention is applicable to both upright and lateral machines.

[0016] It is understood from the description of the above embodiment that the invention has several note worthy advantages, in particular:

[0017] 1. The present invention provides means for directly coupling main motor shaft to working machine without need for skilful workers for precision alignment, requirement for high production cost, and wasting long time labor of assembly so as to improve marketability.

[0018] 2. According to the present invention, excessive machine noise and severe machine vibration can be alleviated.

[0019] Although the invention has been described in terms of a preferred embodiment, it is apparent that numerous variations and modifications may be made without departing from the true spirit and scope thereof as set forth in the following claims. 

What is claimed is:
 1. Means for directly coupling main motor shaft to working machine comprising: employing a machine headstock having an installation cavity; employing a coupling head formed of a hollow body which being able to sleeve into said installation cavity of said headstock along the outer edges of said hollow body; employing a direct coupling main shaft for inserting into said coupling head along inner edges of said coupling head; employing a main motor for supplying machine driving power; and employing a shaft coupling for coupling said main motor with a rotating shaft of said direct coupling main shaft such that the driving power of said main motor is transmitted to said rotating shaft via said shaft coupling.
 2. Means for directly coupling main motor shaft to working machine of claim 1, wherein said working machine is upright type or lateral type.
 3. Means for directly coupling main motor shaft to working machine of claim 1, wherein said coupling head is screw engaged to said headstock.
 4. Means for directly coupling main motor shaft to working machine of claim 1, wherein said directly coupling main shaft is screw engaged to said coupling head.
 5. Means for directly coupling main motor shaft to working machine of claim 1, wherein said main motor is screw engaged to a main motor interconnecting plate.
 6. Means for directly coupling main motor shaft to working machine of claim 5, wherein said main motor interconnecting plate is screw engaged to said coupling head.
 7. Means for directly coupling main motor shaft to working machine of claim 5, wherein said main motor interconnecting plate is interposed between said coupling head and said main motor.
 8. Means for directly coupling main motor shaft to working machine of claim 5, wherein said directly coupling main shaft is inserted into said coupling head in advance of fixedly installing said coupling head in said headstock.
 9. Means for directly coupling main motor shaft to working machine of claim 6, wherein said main motor interconnecting plate is interposed between said coupling head and said main motor. 